General Power Checking - Nokia 3555 Service Manual

General power checking

Check the following voltages:
Signal name Regulator
VIO AVILMA
VBACK AVILMA
VSIM1 AVILMA
VDRAM AVILMA
VAUX AVILMA
VANA AVILMA
VR1 AVILMA
VRFC AVILMA
VRCP1 AVILMA
VREF AVILMA
VCORE BETTY
VOUT BETTY
V2.8 TK63128B-G
VDIG LM3677
VSD LP3929TMEX
VLED1 TK11891F-G
VLED2 TK11891F-G
Power up procedure
Power up procedure starts when the user presses and holds the power/end key.
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Sleep Idle
ON ON
ON ON
ON ON
ON ON
OFF OFF
ON ON
OFF ON
OFF ON
ON ON
ON ON
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
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BB Troubleshooting and Manual Tuning Guide
Nominal Main user
voltage
1.82 Memory, I/Os,
IrDA, Display
2.5 Back-up
battery
1.8/3.0 SIM card
1.82 SDRAM
2.8 Display & hall
sensor
2.5 Audio, some
pull-ups
2.5 Crystal
oscillators
1.8 RAP3G
converters
4.75 To RF parts
1.35 RF reference
1.05 RAP3G digital
1.25
1.35
1.40
2.5 Not used
2.850 Camera
1.800 Camera
2.850 MicroSD card
6.0 Main LCD
Backlight
6.0 2nd LCD
Backlight
RM-257; RM-270; RM-277
Notes
RF active
Accessory
connected
Disabled in
sleep
Disabled in
sleep
Disabled in
sleep
Disabled in
sleep
Disabled in
sleep
Issue 1